Equity Equity, ATM Program (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Aug. 22, 2017 |
Aug. 21, 2015 |
Sep. 30, 2017 |
Sep. 30, 2017 |
|
| Partners' Capital Account, Public Sale of Units Net of Offering Costs | $ 3 | |||
| 2017 ATM Program [Member] | ||||
| Equity Instrument Regulatory Filing Date | Aug. 22, 2017 | |||
| Registration Filing Date | Aug. 21, 2015 | |||
| Common Units Aggregate Value | $ 750 | |||
| Partners' Capital Account, Units, Sale of Units | 72,857 | 72,857 | ||
| Partners' Capital Account, Public Sale of Units Net of Offering Costs | $ 3 | $ 3 |